The reviews keep coming and one thing is clear, the Platypus GravityWorks system is changing how people filter water. Delivering four liters of filtered water is just 2.5 minutes with no pumping, there’s simply no easier or faster way to get safe water away from home. Ideal for bigger groups, the system’s eight-liter capacity eliminates both the worry and hassle of keeping plenty of water around for anything you need.

Features

Fast! Filters four liters in 2.5 minutes.

8L capacity lets you easily transport and store water for groups.

Backflushes in four seconds, maintaining optimal performance with no additional parts or tools required.

I used this on a backpacking trip on the AT and it is hands down the best filter. I have used most filters and for ease of use nothing can come close to this. Having four liters helps when you are in larger groups and or don't want to make a second trip to get more water. Love the fact you can disconnect the filter and dirty bag and use the clean water bag as my hydration in my pack. Big advantage is the clamp that lets water out like a garden hose. Which means you can cool down on a hot day. Highly recommend this filter!!!